/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:14:25,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:14:25,841 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:14:25,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:14:25,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:14:25,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:14:25,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:14:25,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:14:25,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:14:25,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:14:25,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:14:25,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:14:25,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:14:25,884 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:14:25,884 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:14:25,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:14:25,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:14:25,885 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:14:25,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:14:25,885 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:14:25,885 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:14:25,886 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:14:25,887 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:14:25,887 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:14:25,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:14:25,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:14:25,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:14:25,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:14:25,890 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:14:25,890 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:14:26,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:14:26,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:14:26,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:14:26,125 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:14:26,125 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:14:26,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-2_bound2.i [2023-08-03 19:14:27,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:14:27,580 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:14:27,580 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-2_bound2.i [2023-08-03 19:14:27,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc9a272d/b3b0bff4b2b64da987ae3cca5f4439d3/FLAGf1cb6b1ed [2023-08-03 19:14:27,610 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dc9a272d/b3b0bff4b2b64da987ae3cca5f4439d3 [2023-08-03 19:14:27,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:14:27,613 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:14:27,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:14:27,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:14:27,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:14:27,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:14:27" (1/1) ... [2023-08-03 19:14:27,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484ab600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:27, skipping insertion in model container [2023-08-03 19:14:27,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:14:27" (1/1) ... [2023-08-03 19:14:27,660 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:14:28,015 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-2_bound2.i[41530,41543] [2023-08-03 19:14:28,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:14:28,058 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:14:28,087 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:14:28,089 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 19:14:28,106 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-03 19:14:28,111 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_stack_longest-2_bound2.i[41530,41543] [2023-08-03 19:14:28,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:14:28,167 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:14:28,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28 WrapperNode [2023-08-03 19:14:28,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:14:28,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:14:28,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:14:28,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:14:28,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,189 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,211 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 181 [2023-08-03 19:14:28,212 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:14:28,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:14:28,213 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:14:28,213 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:14:28,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:14:28,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:14:28,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:14:28,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:14:28,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (1/1) ... [2023-08-03 19:14:28,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:14:28,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:14:28,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 19:14:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 19:14:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-03 19:14:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-03 19:14:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-03 19:14:28,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:14:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:14:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:14:28,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:14:28,312 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 19:14:28,427 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:14:28,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:14:28,648 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:14:28,656 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:14:28,656 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:14:28,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:14:28 BoogieIcfgContainer [2023-08-03 19:14:28,658 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:14:28,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:14:28,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:14:28,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:14:28,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:14:27" (1/3) ... [2023-08-03 19:14:28,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c65b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:14:28, skipping insertion in model container [2023-08-03 19:14:28,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:14:28" (2/3) ... [2023-08-03 19:14:28,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c65b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:14:28, skipping insertion in model container [2023-08-03 19:14:28,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:14:28" (3/3) ... [2023-08-03 19:14:28,670 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_stack_longest-2_bound2.i [2023-08-03 19:14:28,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:14:28,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:14:28,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 19:14:28,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:14:28,761 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:14:28,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,876 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-03 19:14:28,876 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:14:28,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:14:28,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:14:28,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 181 transitions, 384 flow [2023-08-03 19:14:28,965 INFO L124 PetriNetUnfolderBase]: 37/330 cut-off events. [2023-08-03 19:14:28,965 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:14:28,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 330 events. 37/330 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1442 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-03 19:14:28,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-03 19:14:32,589 INFO L134 LiptonReduction]: Checked pairs total: 21109 [2023-08-03 19:14:32,589 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-03 19:14:32,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:14:32,607 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7666f842, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:14:32,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 19:14:32,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:14:32,612 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-03 19:14:32,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:14:32,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:14:32,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:14:32,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 19:14:32,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:14:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 434086919, now seen corresponding path program 1 times [2023-08-03 19:14:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:14:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007660754] [2023-08-03 19:14:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:14:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:14:32,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:14:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:14:32,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:14:32,789 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:14:32,790 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 19:14:32,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-08-03 19:14:32,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 19:14:32,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-03 19:14:32,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-03 19:14:32,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 19:14:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:14:32,793 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 19:14:32,798 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:14:32,798 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:14:32,858 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:14:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,052 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-03 19:14:33,052 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:14:33,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-03 19:14:33,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:14:33,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 287 transitions, 622 flow [2023-08-03 19:14:33,207 INFO L124 PetriNetUnfolderBase]: 141/985 cut-off events. [2023-08-03 19:14:33,207 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:14:33,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 985 events. 141/985 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 6059 event pairs, 2 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 599. Up to 32 conditions per place. [2023-08-03 19:14:33,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 50576 [2023-08-03 19:14:37,583 INFO L134 LiptonReduction]: Checked pairs total: 79921 [2023-08-03 19:14:37,583 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-03 19:14:37,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:14:37,586 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7666f842, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:14:37,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 19:14:37,590 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:14:37,590 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-03 19:14:37,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 19:14:37,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:14:37,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:14:37,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:14:37,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:14:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -958934176, now seen corresponding path program 1 times [2023-08-03 19:14:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:14:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946403349] [2023-08-03 19:14:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:14:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:14:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:14:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:14:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:14:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946403349] [2023-08-03 19:14:37,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946403349] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:14:37,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:14:37,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:14:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054557644] [2023-08-03 19:14:37,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:14:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:14:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:14:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:14:37,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:14:37,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 541 [2023-08-03 19:14:37,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:14:37,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:14:37,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 541 [2023-08-03 19:14:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:15:36,842 INFO L124 PetriNetUnfolderBase]: 803800/1036004 cut-off events. [2023-08-03 19:15:36,842 INFO L125 PetriNetUnfolderBase]: For 55246/55246 co-relation queries the response was YES. [2023-08-03 19:15:38,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2071526 conditions, 1036004 events. 803800/1036004 cut-off events. For 55246/55246 co-relation queries the response was YES. Maximal size of possible extension queue 20342. Compared 6968102 event pairs, 288919 based on Foata normal form. 9810/760466 useless extension candidates. Maximal degree in co-relation 1357527. Up to 603302 conditions per place. [2023-08-03 19:15:42,800 INFO L140 encePairwiseOnDemand]: 528/541 looper letters, 127 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2023-08-03 19:15:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 144 transitions, 641 flow [2023-08-03 19:15:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:15:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:15:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-08-03 19:15:42,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372766481823783 [2023-08-03 19:15:42,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-08-03 19:15:42,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-08-03 19:15:42,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:15:42,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-08-03 19:15:42,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:42,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:42,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:42,838 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 210 flow. Second operand 3 states and 872 transitions. [2023-08-03 19:15:42,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 144 transitions, 641 flow [2023-08-03 19:15:42,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 144 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:15:42,902 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 274 flow [2023-08-03 19:15:42,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2023-08-03 19:15:42,906 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2023-08-03 19:15:42,906 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 274 flow [2023-08-03 19:15:42,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:42,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:15:42,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:15:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:15:42,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-08-03 19:15:42,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:15:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash 409571604, now seen corresponding path program 1 times [2023-08-03 19:15:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:15:42,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488368972] [2023-08-03 19:15:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:15:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:15:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:15:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:15:43,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:15:43,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488368972] [2023-08-03 19:15:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488368972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:15:43,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691119158] [2023-08-03 19:15:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:15:43,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:15:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:15:43,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:15:43,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 19:15:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:15:43,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:15:43,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:15:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:15:43,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:15:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691119158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:15:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:15:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:15:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592693054] [2023-08-03 19:15:43,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:15:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:15:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:15:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:15:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:15:43,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 541 [2023-08-03 19:15:43,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:15:43,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:15:43,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 541 [2023-08-03 19:15:43,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:16:47,914 INFO L124 PetriNetUnfolderBase]: 803524/1031338 cut-off events. [2023-08-03 19:16:47,914 INFO L125 PetriNetUnfolderBase]: For 209049/210643 co-relation queries the response was YES. [2023-08-03 19:16:50,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277356 conditions, 1031338 events. 803524/1031338 cut-off events. For 209049/210643 co-relation queries the response was YES. Maximal size of possible extension queue 19843. Compared 6862631 event pairs, 289228 based on Foata normal form. 0/798277 useless extension candidates. Maximal degree in co-relation 905466. Up to 1009868 conditions per place. [2023-08-03 19:16:54,100 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 109 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2023-08-03 19:16:54,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 594 flow [2023-08-03 19:16:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:16:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:16:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1366 transitions. [2023-08-03 19:16:54,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049907578558226 [2023-08-03 19:16:54,104 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1366 transitions. [2023-08-03 19:16:54,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1366 transitions. [2023-08-03 19:16:54,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:16:54,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1366 transitions. [2023-08-03 19:16:54,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 273.2) internal successors, (1366), 5 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:16:54,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:16:54,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:16:54,116 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 274 flow. Second operand 5 states and 1366 transitions. [2023-08-03 19:16:54,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 594 flow